Magnetically coupling radio frequency antennas

ABSTRACT

The present disclosure is directed to a system and method for using magnetically coupled antennas to enhance receptivity and/or reading range of radio frequency (RF) transaction devices. In some implementations, a method for boosting RF signals includes wirelessly receiving an RF signal from a transaction terminal at a passive antenna. The passive antenna is magnetically coupled to the antenna of a transaction card. The transaction card is inserted in a mobile host device and configured to execute a payment application using user credentials in response to at least a transaction request and transmits at least one transaction response to the transaction terminal based, at least in part, on the executed transaction application and using the antenna either standalone or through the coupled antenna configuration. The RF signal is transmitted to the transaction card using the inductive coupling with the terminal.

CLAIM OF PRIORITY

This application is a continuation-in-part of and claims priority to U.S. patent application Ser. No. 12/571,163, filed Sep. 30, 2009, which is a continuation-in-part of and claims priority to U.S. patent application Ser. No. 12/272,527, filed Nov. 17, 2008, which is a continuation-in-part of and claims priority to U.S. patent application Ser. No. 12/209,087, filed Sep. 11, 2008, which claims priority under 35 U.S.C. §119(e) to U.S. Provisional Application No. 60/971,813, filed on Sep. 12, 2007, the entire contents of each of the above-identified cases are hereby incorporated by reference.

TECHNICAL FIELD

This invention relates to network communications and, more particularly, to wirelessly communicating radio frequency signals.

BACKGROUND

Portable electronic devices and tokens have become an integrated part of the regular day to day user experience. There is a wide variety of common portable and handheld devices that users have in their possession including communication, business and entertaining devices such as cell phones, music players, digital cameras, smart cards, memory token and variety of possible combinations of the aforementioned devices and tokens. All of these devices share the commonality that consumer are accustomed to carrying them with them most of the time and to most places. This is true across the various demographics and age groups regardless of the level of the sophistication of the consumer, their age group, their technical level or background.

These common handheld devices offer options for expandable memory. Micro Secure Digital (microSD) is the popular interface across high-end cellphones while SD and MultiMediaCard (MMC) interfaces are also available in limited models. MicroSD is the least common denominator supported by the majority of these devices and tokens (in terms of size). In addition, adaptors are available to convert a MicroSD into MiniSD, SD, MMC and USB Although most popular MP3 player (iPOD) offer's a proprietary interface, competing designs do offer standard interfaces. Digital cameras offer mostly SD and MMC while extreme Digital (xD) is another option. Micro and Mini versions of these interfaces are also available in several models. Mini-USB is increasingly available across cellphones, digital cameras and MP3 players for synchronization with laptops.

SUMMARY

The present disclosure is directed to a system and method for using magnetically coupled antennas to enhance receptivity and/or reading range of radio frequency (RF) transaction devices. In some implementations, a method for boosting RF signals includes wirelessly receiving an RF signal from a transaction terminal at a passive antenna. The passive antenna is magnetically coupled to the antenna of a transaction card. The transaction card is inserted in a mobile host device and configured to execute a payment application using user credentials in response to at least a transaction request and transmits at least one transaction response to the transaction terminal based, at least in part, on the executed transaction application and using the antenna either standalone or through the coupled antenna configuration. The RF signal is transmitted to the transaction card using the inductive coupling with the terminal.

The details of one or more embodiments of the invention are set forth in the accompanying drawings and the description below. Other features, objects, and advantages of the invention will be apparent from the description and drawings, and from the claims.

DESCRIPTION OF DRAWINGS

FIG. 1 is an example transaction system in accordance with some implementations of the present disclosure;

FIG. 2 is an example transactions system that transmits transaction information through a cellular core network;

FIG. 3 is an example intelligent card of FIG. 1 in accordance with some implementations of the present disclosure;

FIG. 4 is an example intelligent card that selectively switching an antenna;

FIGS. 5A and 5B illustrate an example of antenna design 1;

FIGS. 6A and 6B illustrate another example of antenna design

FIGS. 7A and 7B illustrate another example of antenna design

FIGS. 8A-8C illustrate another example of antenna design;

FIGS. 9A-9D illustrate another example of antenna design;

FIGS. 10A and 10B illustrate another example of antenna design;

FIGS. 11A and 11B illustrate another example of antenna design;

FIGS. 12A and 12B illustrates yet other examples of an antenna design; and

FIGS. 13A-C are cross-sectional views for a system that passively amplifies RF signals;

FIGS. 14A and 14B are cross-sectional views for another system that passively amplifies RF signals;

FIGS. 15A and 15B are cross-sectional views for a system that actively amplifies RF signals;

FIGS. 16A-C illustrate another example of antenna designs; and

FIG. 17 is a cross-sectional view for a system that actively amplifies RF signals;

FIGS. 18A-D illustrate an example booster element affixed to a mobile device;

FIGS. 19A-C illustrate another example booster element affixed to a mobile device;

FIGS. 20A-D illustrate yet another example booster element affixed to a mobile device;

FIGS. 21A-C illustrate another example booster element affixed to a mobile device;

FIGS. 22A-C illustrate an example booster element affixed to a terminal; and

FIGS. 23A-C illustrate another example booster element embedded in a mobile device.

Like reference symbols in the various drawings indicate like elements.

DETAILED DESCRIPTION

FIG. 1 is a block diagram illustrating an example transaction system 100 for wirelessly executing transactions using an intelligent card independent of a host device. For example, the system 100 may include a micoSecure Digital (microSD) card that executes transactions with financial institutions independent of a host device. Aside from microSD, the system 100 may include other mass storage interfaces that connect an intelligent card to the host device such as, for example, MultiMediaCard (MMC), SD, Universal Serial Bus (USB), Apple iDock, Firewire, and/or others. An intelligent card is a device configured to insert into or otherwise attach to a host device and access or otherwise execute services (e.g., transactions) independent of the host device. In some implementations, the intelligent card may be shaped as a microSD card including, for example, notches, raised portions and/or other features. The system 100 may include an intelligent card that includes a dual interface. The dual interface may connect the intelligent card to both the host device through a physical interface (e.g., SD, MMC, USB) and external devices through a wireless connection (e.g., NFC, ISO 14443). In some implementations, the intelligent card may include an embedded secure chip, Central Processing Unit (CPU) with operating system, local memory and value added applications accessible by the user through the host device. A host device may include a cellphone, a smartphone, a Personal Digital Assistant (PDA), a MPEG-1 Audio Layer 3 (MP3) device, a digital camera, a camcorder, a client, a computer, and/or other device that includes a mass memory and/or peripheral interface. In some implementations, the intelligent card can operate as a master with the host device being a slave such that the intelligent card controls operational aspects of the host device such as a user interface. The intelligent card in the system 100 may execute one or more of the following: selectively activate an antenna for wireless transactions in response to at least an event; verify the host device with a financial institution through, for example, a Point Of Sale (POS) using a host signature; execute a transaction with a financial institution through, for example, a POS terminal independent of the host device; and/or other processes. By providing an intelligent card, the system 100 may wirelessly execute transactions with financial institutions without either requiring additional hardware, software, and/or firmware on the host device and/or without requiring changes to existing hardware, software, and/or firmware for reader terminals to enable a user to wirelessly execute a transaction.

At a high level, the system 100 includes an offline store 102 and clients 104 a and 104 b coupled to financial institutions 106 through a network 108. While not illustrated, the system 100 may included several intermediary parties between the financial institution 106 and the network such as, for example, a transaction acquirer and/or a payment network host. The offline store 102 includes a mobile device 110 a having a transaction card 112 a and a Point of Sale (POS) device 114 that executes transactions with customers. The POS device 114 includes a Graphical User Interface (GUI) 109 for presenting information to and/or receiving information from users. In some implementations, the POS 114 may transmit a request to execute a transaction to the transaction card 112. The transaction card 112 may transmit authentication information to the POS 114. The client 104 includes the GUI 115 for presenting information associated with the system 100. The client 104 a includes a card reader 116 that interfaces the transaction card 112 c with the client 104 a. The financial institution 106 may authorize the transaction based, at least in part, on information transmitted by the transaction card 112. The mobile device 110 includes a GUI 111 for presenting information associated with financial transactions.

The offline store 102 is generally at least a portion of an enterprise having a physical presence (e.g., building) for operations. For example, the offline store 102 may sell goods and/or services at a physical location (e.g., a brick-and-mortar store) directly to customers. In this example, the offline store 102 buys or otherwise receives goods (e.g., produce) from distributors (not illustrated) and then may sell these goods to customers, such as users of the mobile device 110. In general, the offline store 102 may offer face-to-face experiences with customers in providing goods and/or services. For example, the offline store 102 may be a click-and-mortar store such that a user selects a good or service using the Internet and purchases and receives the good or service at the offline store 102. The offline store 102 may provide one or more of the following services associated with goods: inventory, warehousing, distribution, and/or transportation. As a result, the offline store 102 may not immediately distribute goods received from distributors. The offline store 102 may include a single retail facility, one or more retail facilities at a single geographic location, and/or a plurality of retail facilities geographically distributed. In some cases, two or more entities may represent portions of the same legal entity or affiliates. For example, the offline store 102 and distributors may be departments within one enterprise. In summary, the offline store 102 may wirelessly execute financial transactions with the mobile device 110.

Each mobile device 110 comprises an electronic device operable to interface with the transaction card 112 a. For example, the mobile device 110 may receive and transmit wireless and/or contactless communication with the system 100. As used in this disclosure, the mobile devices 110 are intended to encompass cellular phones, data phones, pagers, portable computers, SIP phones, smart phones, personal data assistants (PDAs), digital cameras, MP3 players, camcorders, one or more processors within these or other devices, or any other suitable processing devices capable of communicating information with the transaction card 112. In some implementations, the mobile devices 110 may be based on a cellular radio technology. For example, the mobile device 110 may be a PDA operable to wirelessly connect with an external or unsecured network. In another example, the mobile device 110 may comprise a smartphone that includes an input device, such as a keypad, touch screen, mouse, or other device that can accept information, and an output device that conveys information associated with a transaction with the offline store 102, including digital data, visual information, or GUI 111.

The GUI 111 comprises a graphical user interface operable to allow the user of the mobile device 110 to interface with at least a portion of the system 100 for any suitable purpose, such as authorizing transactions and/or displaying transaction history. Generally, the GUI 111 provides the particular user with an efficient and user-friendly presentation of data provided by or communicated within the system 100 and/or also an efficient and user-friendly means for the user to self-manage settings and access services offered by the financial institution 106. The GUI 111 may comprise a plurality of customizable frames or views having interactive fields, pull-down lists, and/or buttons operated by the user. The term graphical user interface may be used in the singular or in the plural to describe one or more graphical user interfaces and each of the displays of a particular graphical user interface. The GUI 111 can include any graphical user interface, such as a generic web browser or touch screen, that processes information in the system 100 and presents the results to the user.

The transaction card 112 can include any software, hardware, and/or firmware configured to wirelessly execute transactions with the POS device 114. For example, the transaction card 112 may execute a contactless transaction with the POS device 114 independent of the mobile device 110 a. In other words, the transaction card 112 may wirelessly execute transactions without aspects of the transaction being executed by the mobile device 110. The transaction card 112 may execute transactions with the POS device 114 using short range signals such as NFC (e.g., ISO 18092/ECMA 340), ISO 14443 type A/B, ISO 15693, Felica, MiFARE, Bluetooth, Ultra-wideband (UWB), Radio Frequency Identifier (RFID), contactless signals, proximity signals, and/or other signals compatible with retail payment terminals (e.g., POS 114). In some implementations, the transaction card 112 may include one or more chipsets that execute an operating system and security processes to independently execute the transaction. In doing so, the mobile device 110 does not require additional hardware, software, and/or firmware to wirelessly execution a transaction with the POS 114 such as an NFC transaction. In some implementations, the transaction card 112 may execute one or more of the following: wirelessly receive a request from the POS device 114 to execute a transaction and/or and provide a response; translate between wireless protocols and protocols compatible with the transaction card 112; translate between transaction-card protocols and protocols compatible with mobile device 110; present and receive information (e.g., PIN request, PIN) from the user through the GUI 111; decrypt and encrypt information wirelessly transmitted between the transaction card 112 and the POS 114; execute applications locally stored in the transaction card 112; selectively switch the antenna of the transaction card 112 on and off based, at least in part, on one or more events; execute authentication processes based, at least in part, on information received, for example, through the GUI 111; transmit a host signature to POS 114 in response to at least a transaction challenge; store, at least in part, details of the transaction executed between place between the card 112 and the POS device 114; generate and/or present alerts (e.g., audio-visual alerts) to the user through the GUI 111; generate and/or transmit wireless-message alerts to the financial institution 106 using the mobile device 110 if cellular capable; and/or others. In some implementations, the transaction card 112 may include a communication module with of a protocol translation module, antenna tuning circuit, power circuit and a miniature antenna tuned to exchange wireless data with a retail terminal 114.

In some implementations, the transaction card 112 may initiate a transaction in response to at least a user selecting a graphical element in the GUI 111. The transaction card 112 may initiate a transaction with the POS 114 in response to at least wireless request transmitted by the POS 114. In some implementations, the transaction card 112 may selectively switch the antenna between an on and off state in response to one or more events. The one or more events may include a user request, completion of transaction, insertion of card 112 in a different mobile device, location change, timer events, detection of incorrect PIN entered by the user, change of wireless network that the device is connected to, message received from the financial institution 106 using wireless communication methods such as SMS, and/or other events. For example, the transaction card 112 may receive one or more commands to switch the antenna off from a cellular network (not illustrated) through the mobile device 110. In some implementations, the transaction card 112 may request user identification such as a PIN, a user ID and password combination, biometric signature, and/or others.

In regards to translating between protocols, the transaction card 112 may process information in, for example, ISO 7816, a standard security protocol, and/or others. In this case, the transaction card 112 may translate between an NFC protocol (e.g., ISO 18092) and the transaction-card protocol. In some implementations, ISO 7816 commands may be encapsulated within interface commands used to transmit data between the host device 114 and the card 112. In addition, the transaction card 112 may interface the mobile device 110 through a physical interface such as MicroSD, Mini-SD SD, MMC, miniMMC, microMMC, USB, miniUSB, microUSB, firewire, Apple iDock, and/or others. In regard to security processes, the transaction card 112 may implement one or more encryption algorithms to secure transaction information such as card number (e.g., credit card number, debit-card number, bank account number), PIN, and/or other security related information. The security related information may include an expiry date, card verification code, user name, home phone number, user zip code and/or other user information associated with verifying an identity of the card holder. In some implementations, the transaction card 112 may execute private key (symmetric algorithms) such as DES, TDES and/or others or public key (asymmetric algorithms) such as RSA, elliptic curves, and/or others. In addition, the transaction card 112 may include memory (e.g., Flash, EEPROM) for storing user data, applications, offline Webpages, and/or other information. In regards to applications, the transaction card 112 may execute a locally stored application and present information to and received information from the user through the GUI 111. For example, the transaction card 112 may execute an application used to synchronize an account balance with the financial institution 106 using the GUI 111 and the mobile device 110. Alternatively or in addition to applications, the transaction card 112 may present offline Web pages to the user using the GUI 111. In response to initiating a transaction, the transaction card 112 may automatically present an offline Web page through the GUI 111. In some implementations, the offline Web page can be associated with a financial institution 106. In some implementations, the transaction card 112 can be backward compatible and operate as a mass storage device. For example, if the wireless interface of the transaction card 112 is not available or deactivated, the transaction card 112 may operate as a mass storage device enabling users to access data stored in the memory component (e.g., Flash). In some implementations, the transaction card 112 can execute a set of initialization commands in response to at least insertion into the mobile device 110. These initialization commands may include determining device related information for the mobile device 100 (e.g., phone number, signature, connected network information, location information and other available properties), determining user relating information (e.g., PIN code, activation code), incrementing counters, setting flags and activating/deactivating functions according to pre-existing rules and/or algorithms.

In some implementations, the transaction card 112 may automatically execute one or more fraud control processes. For example, the transaction card 112 may identify an operational change and automatically transmit a notification to the financial institution based, at least in part, on the identified change. The transaction card 112 may execute two fraud control processes: (1) determine a violation of one or more rules; and (2) automatically execute one or more actions in response to at least the violation. In regards to rules, the transaction card 112 may locally store rules associated with updates to operational aspects of the transaction card 112. For example, the transaction card 112 may store a rule indicating a change in mobile host device 110 is an operational violation. In some implementations, the transaction card 112 may store rules based, at least in part, on updates to one or more of the following: phone number of host device 110; MAC address of host device 110; network wirelessly connected to host device 110; location of host device; and/or other aspects. In response to one or more events matching or otherwise violating rules, the transaction card 112 may execute one or more processes to substantially prevent or otherwise notify the financial institutions 106 of potentially fraudulent activity. For example, the transaction card 112 may execute a command to block an associated user account and/or the transaction card 112. Alternatively or in addition, the transaction card 112 may transmit a command to the financial institution 106 to call the mobile host device 110. In some implementations, the transaction card 112 may execute a command based, at least in part, on an event type. In some examples, the transaction card 112 may initiate a call with the financial institution 106 in response to at least a change in number of the host device 110. In some examples, the transaction card 112 may re-execute an activation process in response to at least a specified event type. An activation process may include activating the transaction card and/or financial account as discussed in more detail with respect to FIG. 9. In some implementations, the transaction card 112 may execute a command to disconnect the GUI 111 from the transaction card 112. The transaction card 112 may present a disconnection notification through the GUI 111 prior to executing the command. In some implementations, the transaction card 112 may transmit a command to the financial institution 106 to deactivate an account associated with the card 112.

In some implementations, the POS 114 may transmit a transaction request 117 to the transaction card 112 for information to generate an authorization request 118. In response to at least the transaction request, the transaction card 112 may transmit one or more transaction responses 119 identifying information associated with a payment account. In some implementations, the POS device 114 may transmit a request 118 to authorize a transaction to the financial institution 106. The authorization information may include an account number, a transaction amount, user credentials, and/or other information. In response to at least the transaction request 118, the financial institution 106 may transmit an authorization response 120 to the POS device 114. In some implementations, the POS device 114 may transmit the response 120 to the transaction card 112. The transaction response 120 may include, for example, a receipt presentable to the user through the GUI 111 a. In some implementations, the financial institution 106 may transmit the authorization response 120 to the mobile device through a cellular core network (see FIG. 2). In this implementation, the financial institution 106 may have stored the association between the mobile device 110 and the transaction card 112 during the user sign-up process, automatically upon user activation of the card 112 when, for example, the card 112 is initially inserted into the mobile device 110, and/or other event. In the illustrated implementation, the POS 114 includes the GUI 109.

The GUI 109 comprises a graphical user interface operable to allow the user of the POS 114 to interface with at least a portion of the system 100 for any suitable purpose, such as a user entering transaction information (e.g., PIN, transaction acceptance) and/or and presenting transaction information (e.g., transaction amount). Generally, the GUI 109 provides the particular user with an efficient and user-friendly presentation of data provided by or communicated within the system 100 and/or also an efficient and user-friendly means for the user to initiate a wirelessly transaction with the transaction card 112. The GUI 109 may present a series of screens or displays to the user to, for example, accept a transaction and enter security information such as a PIN.

In some implementations, the transaction card 112 can be implemented differently. The transaction card 112 may be implemented as a KeyFOB and remains live outside the mobile device 110 as a FOB. In this case, the transaction card 112 may be passive and powered from an induction magnetic field generated by the POS 114. The transaction card 112 may be implemented in the form of an industrial integrated circuit chip for mounting on a PCB or IC chip. In some implementations, the transaction card 112 may be implemented in the form of a self contained desktop standalone unit powered by external AC adapter or stand alone box. In some implementations, the transaction card 112 can be implemented as an external attachment to a mobile device 110 (e.g., case) and connected to the mobile device using a peripheral interface such as USB, serial port, the iDock apple proprietary interface, and/or other interface.

In some implementations, the transaction card 112 may operate in accordance with one or more of the following modes: active card emulation; active reader; self train; killed; memory; inactive; and/or other modes. The transaction card 112 may operate active-card-emulation mode to convert the mobile device 110 to a contactless payment device loaded with a financial vehicle (FV) that may be, for example, a credit card, a debit card, a gift card and/or other retail payment product. In this mode, the transaction card 112 may execute payment transactions at any capable retail payment terminal (e.g., POS 114) that accepts contactless payment transactions. For example, such terminals may be contactless-enabled terminals currently being deployed by merchants under MasterCard's paypass, Visa's paywave programs, Amex ExpressPay, Discover Zip, and/or other payment programs. After the antenna of the transaction card 112 is activated in this mode, a merchant terminal may detect the presence of a host device with the transaction card 112 and prompt the user to authorize a transaction such as by entering a PIN, signing on a terminal interface, confirming the amount of the transaction, and/or other action. In this mode, such transactions may be handled as a normal card-present transaction. In other words, the POS 114 may perceive the transaction card 112 as a contactless plastic payment card and may communicate with the transaction card 112 as a contactless plastic payment card to execute payment transactions. In these implementations when the card 112 operates in an active-card emulation mode, the POS 114 can wirelessly communicate with the transaction card 112 using the same signals used to communicate with a contactless plastic payment card. In this active-card emulation mode, the transaction card 112 emulates a contactless plastic payment card and may be backward compatible with the POS 114. In this implementation, neither the terminal nor the financial institution may require additional software to execute the transaction. In addition, the transaction card 112 in this mode may be used for other applications such as physical access control (to open gates either in a corporate environment or in a transit environment), logical access control (to request network access via a PC), application access control (to buy access for amenities such as transportation, movies or wherever payment needs to be made to gain access to a facility), and/or other applications.

In the active-reader mode, the transaction card 112 may convert the mobile device 110 to a contactless reader device capable of receiving data when in range of a transmitting terminal (e.g., POS 114). In some implementations, this mode can require special NFC hardware with reader mode capability as part of the transaction card 112. In the event that the mobile device 110 is proximate (e.g., 10 cm or less) a transmitting terminal, the reader mode of the transaction card 112 may activated and prompt the user for authorization to receive data through the GUI 111. This mode may only be suitable for mobile devices 110 with a UI element, such as an OK button and a screen, an LED to indicate that data reception is being requested, and/or other interfaces. Once the user authorizes the transmission, the transaction card 112 in this mode may receive, and locally store, process and may execute a transaction and/or forward received data to another entity. For example, the transaction card 112 in this mode may receive content through promotional posters, validating the purchase of a ticket, and/or others. For example, the transaction card 112 in this mode may function as a mobile POS terminal receiving transaction information from a plastic contactless card/FOB and instructing the POS 114 to prepare a transaction authorization request for the financial institution 106 through a cellular core network. Once the financial institution 106 authorizes the transaction, the mobile device 110 may display the confirmation of the transaction to the user through the GUI 111.

In regards to the self-train mode, the transaction card 112 may execute a version of the reader mode. In some implementations, the self-train mode can be activated by a special action (e.g., a needle point press to a small switch, entry of an administrative password via the GUI 111). In response to at least activating this mode, the transaction card 112 may be configured to receive personalization data over, for example, the short range wireless interface from another peer transaction card such as the plastic contactless cards compliant with this functionality and issued by the financial institution 106 or a specially prepared administrative card for this purpose. Personalization data received in this mode may include encrypted FV information that is stored in secured memory of the transaction card 112. In some implementations, the transaction card 112 in this mode may receive the FV information through a contactless interface of a transmitter and/or others. The transaction card 112 may then synthesize the FV information that corresponds to the user account and personalize an internal security module that includes, for example, payment applications for executing transactions with financial institutions 106 and associated user credentials. The self-train mode may be used to re-personalize the transaction card 112 in the field. In some implementations, all previous data can be deleted if the self-train mode is activated. The self-train mode may be a peer-to-peer personalization mode where the card 112 may receive personalization information from another transaction card 112. This mode may represent an additional personalization mode as compared with factory, store and/or Over-The-Air (OTA) personalization scenarios which may be server to client personalization scenarios. In some implementations, the self-train mode may be a peer-to-peer personalization mode where the transaction card 112 receives personalization information from another transaction card. Since two transaction cards 112 are used in this mode, this mode may be different from a server-to-client personalization scenario as with a factory, store, and OTA personalization.

In regards to the inactive mode, the transaction card 112 may temporarily deactivate the contactless interface. In some implementations, the inactive mode can be activated through the physical interface with the mobile device 110 such as a microSD interface. In response to at least the activation of the inactive mode, the transaction card 112 may temporarily behave as only a mass-memory card. In some implementations, the card 112 may also enter this state when the reset needle point is pressed. In this mode, the transaction card 112 may preserve locally-stored information including financial user data. In this mode, the transaction card 112 may execute the activation process and if successful may return to the active mode. Financial institutions 106 may use this mode to temporarily prevent usage in response to at least identifying at least potentially fraudulent activity.

In regards to the killed mode, the transaction card 112 may permanently deactivate the contactless interface. In some implementations, the killed mode is activated through the physical interface with the mobile device 110 such as a microSD interface. In response to at least the activation of the killed mode, the transaction card 112 may permanently behaves as a mass memory stick. In the event that the reset needle point is pressed, the transaction card 112 may, in some implementations, not be made to enter any other modes. In addition, the transaction card 112 may delete financial content in memory in response to at least this mode being activated. In some implementations, financial institutions 106 may use this mode to delete data from a transaction card 112 that is physically lost but still connected to the wireless network via the host device 110.

In regards to the memory mode, the transaction card 112 may operate as a mass memory stick such that the memory is accessible through conventional methods. In some implementations, the transaction card 112 may automatically activate this mode in response to at least being removed from the host device, inserted into a non-authorized host device, and/or other events. The transaction card 112 may be switched to active mode from the memory mode by, for example, inserting the card 112 into an authorized device or may be switched from this mode into the self-train mode to re-personalize the device for a new host device or a new user account. In some implementations, the memory mode may operate substantially same as the inactive mode.

In some implementations, the transaction card 112 may be re-personalized/updated such as using software device management process and/or a hardware reset. For example, the user may want to re-personalize the transaction card 112 to change host devices, to have multiple host devices, and/or other reasons. In regards to the software device management, the user may need to cradle the new host device with the transaction card 112 inserted to launch the software device management application. In some implementations, the software management application can be an application directly installed on the client 104, integrated as a plug-in to a normal synchronization application such as ActiveSync, available via a browser plug-in running on the plug-in provider's website, and/or other sources. The user may log into the application and verify their identity, and in response to verification, the application may allow access to a devices section in the device management application. The device management application may read the transaction card 112 and display the MAC addresses, signatures of the devices that he has inserted his plug-in to, and/or other device specific information. The mobile device 110 may be marked as active and the host device may be shown as disallowed or inactive. The application may enable the user to update the status of the new host device, and in response to at least the selection, the device management application may install the signature on the new host device and mark update the status as allowable in secure memory of the transaction card 112. The user may be able to also update the status of the mobile device 110 to disallowed. Otherwise, both devices may be active and the transaction card 112 may be switched between the two devices. In regards to the hardware reset process, the use may use the reset needle point press on the physical transaction card 112 to activate the self-train mode. In this mode, the financial data may be deleted and have to be reloaded. When the transaction card 112 is inserted into the new host device, the provisioning process may begin as discussed above.

The POS 114 can include any software, hardware, and/or firmware that receives from the transaction card 112 account information for executing a transaction with one or more financial institutions 106. For example, the POS 114 may be an electronic cash register capable of wirelessly communicating transaction information with the transaction card 112 a. The POS 114 may communicate transaction information associated with traditional contact payment methods such as plastic cards and checks. If enabled for wireless/contactless payment transactions, the POS 114 may communicate information with the transaction card 112 in one or more the following formats: 14443 Type A/B, Felica, MiFare, ISO 18092, ISO 15693; and/or others. The transaction information may include verification information, check number, routing number, account number, transaction amount, time, driver's license number, merchant ID, merchant parameters, credit-card number, debit-card number, digital signature and/or other information. In some implementations, the transaction information may be encrypted. In illustrated implementation, the POS 114 can wirelessly receive encrypted transaction information from the transaction card 112 and electronically send the information to one or more of the financial institutions 106 for authorization. For example, the POS 114 may receive an indication that a transaction amount has been accepted or declined for the identified account and/or request additional information from the transaction card 112.

As used in this disclosure, the client 104 are intended to encompass a personal computer, touch screen terminal, workstation, network computer, a desktop, kiosk, wireless data port, smart phone, PDA, one or more processors within these or other devices, or any other suitable processing or electronic device used for viewing transaction information associated with the transaction card 112. For example, the client 104 may be a PDA operable to wirelessly connect with an external or unsecured network. In another example, the client 104 may comprise a laptop that includes an input device, such as a keypad, touch screen, mouse, or other device that can accept information, and an output device that conveys information associated with transactions executed with the financial institutions 106, including digital data, visual information, or GUI 115. In some implementations, the client 104 b can wirelessly communicate with the transaction card 112 b using, for example, an NFC protocol. In some implementations, the client 104 a includes a card reader 116 having a physical interface for communicating with the transaction card 112 c. In some implementations, the card reader 116 may at least include an adapter 116 b that adapts the interface supported by the client 104 (e.g., USB, Firewire, Bluetooth, WiFi) to the physical interface supported by the card 112 (e.g., SD/NFC). In this case, the client 104 a may not include a transceiver for wireless communication.

The GUI 115 comprises a graphical user interface operable to allow the user of the client 104 to interface with at least a portion of the system 100 for any suitable purpose, such as viewing transaction information. Generally, the GUI 115 provides the particular user with an efficient and user-friendly presentation of data provided by or communicated within the system 100. The GUI 115 may comprise a plurality of customizable frames or views having interactive fields, pull-down lists, and/or buttons operated by the user. The term graphical user interface may be used in the singular or in the plural to describe one or more graphical user interfaces and each of the displays of a particular graphical user interface. The GUI 115 can include any graphical user interface, such as a generic web browser or touch screen, that processes information in the system 100 and presents the results to the user. The financial institutions 106 can accept data from the client 104 using, for example, the web browser (e.g., Microsoft Internet Explorer or Mozilla Firefox) and return the appropriate responses (e.g., HTML or XML) to the browser using the network 108. In some implementations, the GUI 111 c of the transaction card 112 c may be presented through the GUI 115 a of the client 104 a. In these implementations, the GUI 115 a may retrieve user credentials from the GUI 111 c and populate financial forms presented in the GUI 115 a. For example, the GUI 115 a may present a forum to the user for entering credit card information to purchase a good through the Internet, and the GUI 115 a may populate the form using the GUI 111 c in response to at least a request from the user.

Financial institutions 106 a-c can include any enterprise that may authorize transactions received through the network 108. For example, the financial institution 106 a may be a credit card provider that determines whether to authorize a transaction based, at least in part, on information received through the network 106. The financial institution 106 may be a credit card provider, a bank, an association (e.g., VISA), a retail merchant (e.g., Target), a prepaid/gift card provider, an internet bank, and/or others. In general, the financial institution 106 may execute one or more of the following: receive a request to authorize a transaction; identify an account number and other transaction information (e.g., PIN); identify funds and/or a credit limit associated with the identified account; determine whether the transaction request exceeds the funds and/or credit limit and/or violates any other rules associated with the account; transmit an indication whether the transaction has been accepted or declined; and/or other processes. In regards to banking, the financial institution 106 may identify an account number (e.g., bank account, debit-card number) and associated verification information (e.g., PIN, zip code) and determine funds available to the account holder. Based, at least in part, on the identified funds, the financial institution 106 may either accept or reject the requested transaction or request additional information. As for encryption, the financial institution 106 may use a public key algorithm such as RSA or elliptic curves and/or private key algorithms such as TDES to encrypt and decrypt data.

Network 108 facilitates wireless or wired communication between the financial institutions and any other local or remote computer, such as clients 104 and the POS device 114. Network 108 may be all or a portion of an enterprise or secured network. While illustrated as single network, network 108 may be a continuous network logically divided into various sub-nets or virtual networks without departing from the scope of this disclosure, so long as at least a portion of network 108 may facilitate communications of transaction information between the financial institutions 106, the clients 104, and the offline store 102. In some implementations, network 108 encompasses any internal or external network, networks, sub-network, or combination thereof operable to facilitate communications between various computing components in system 100. Network 108 may communicate, for example, Internet Protocol (IP) packets, Frame Relay frames, Asynchronous Transfer Mode (ATM) cells, voice, video, data, and other suitable information between network addresses. Network 108 may include one or more local area networks (LANs), radio access networks (RANs), metropolitan area networks (MANs), wide area networks (WANs), all or a portion of the global computer network known as the Internet, and/or any other communication system or systems at one or more locations.

FIG. 2 is a block diagram illustrating an example transaction system 200 for wirelessly communicating transactions information using cellular radio technology. For example, the system 200 may wirelessly communicate a transaction receipt to a transaction card 112 using a mobile host device 110 and cellular radio technology. In some implementations, cellular radio technology may include Global System for Mobile Communication (GSM), Code Division Multiple Access (CDMA), Universal Mobile Telecommunications System (UMTS), and/or any other cellular technology. The financial institutions 106 may assign one or more mobile host devices 110 to a transaction card 112 in response to one or more events. In some examples, the user may register the one or more mobile devices 110 with the financial institution 106 in connection with, for example, requesting the associated transaction card 112. In some examples, the transaction card 112 may register the mobile host device 110 with the financial institution 106 in response to at least an initial insertion into the device 110. Regardless of the association process, the system 100 may use the cellular capabilities of the host devices 110 to communicate information between the financial institutions 106 and the transaction card 112. In using the cellular radio technology of the host device 110, the system 100 may communicate with the transaction card 112 when the card 112 is not proximate a retail device, such as the POS device 114 of FIG. 1.

In the illustrated implementation, the cellular core network 202 typically includes various switching elements, gateways and service control functions for providing cellular services. The cellular core network 202 often provides these services via a number of cellular access networks (e.g., RAN) and also interfaces the cellular system with other communication systems such as the network 108 via a MSC 206. In accordance with the cellular standards, the cellular core network 202 may include a circuit switched (or voice switching) portion for processing voice calls and a packet switched (or data switching) portion for supporting data transfers such as, for example, e-mail messages and web browsing. The circuit switched portion includes MSC 206 that switches or connects telephone calls between radio access network (RAN) 204 and the network 108 or another network, between cellular core networks or others. In case the core network 202 is a GSM core network, the core network 202 can include a packet-switched portion, also known as General Packet Radio Service (GPRS), including a Serving GPRS Support Node (SGSN) (not illustrated), similar to MSC 206, for serving and tracking communication devices 102, and a Gateway GPRS Support Node (GGSN) (not illustrated) for establishing connections between packet-switched networks and communication devices 110. The SGSN may also contain subscriber data useful for establishing and handing over call connections. The cellular core network 202 may also include a home location register (HLR) for maintaining “permanent” subscriber data and a visitor location register (VLR) (and/or an SGSN) for “temporarily” maintaining subscriber data retrieved from the HLR and up-to-date information on the location of those communications devices 110 using a wireless communications method. In addition, the cellular core network 202 may include Authentication, Authorization, and Accounting (AAA) that performs the role of authenticating, authorizing, and accounting for devices 110 operable to access GSM core network 202. While the description of the core network 202 is described with respect to GSM networks, the core network 202 may include other cellular radio technologies such as UMTS, CDMA, and others without departing from the scope of this disclosure.

The RAN 204 provides a radio interface between mobile devices and the cellular core network 202 which may provide real-time voice, data, and multimedia services (e.g., a call) to mobile devices through a macrocell 208. In general, the RAN 204 communicates air frames via radio frequency (RF) links. In particular, the RAN 204 converts between air frames to physical link based messages for transmission through the cellular core network 202. The RAN 204 may implement, for example, one of the following wireless interface standards during transmission: Advanced Mobile Phone Service (AMPS), GSM standards, Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), IS-54 (TDMA), General Packet Radio Service (GPRS), Enhanced Data Rates for Global Evolution (EDGE), or proprietary radio interfaces. Users may subscribe to the RAN 204, for example, to receive cellular telephone service, Global Positioning System (GPS) service, XM radio service, etc.

The RAN 204 may include Base Stations (BS) 210 connected to Base Station Controllers (BSC) 212. BS 210 receives and transmits air frames within a geographic region of RAN 204 (i.e. transmitted by a cellular device 102 e) and communicates with other mobile devices 110 connected to the GSM core network 202. Each BSC 212 is associated with one or more BS 210 and controls the associated BS 210. For example, BSC 212 may provide functions such as handover, cell configuration data, control of RF power levels or any other suitable functions for managing radio resource and routing signals to and from BS 210. MSC 206 handles access to BSC 212 and the network 108. MSC 206 may be connected to BSC 212 through a standard interface such as the A-interface. While the elements of RAN 204 are describe with respect to GSM networks, the RAN 204 may include other cellular technologies such as UMTS, CDMA, and/or others. In the case of UMTS, the RAN 204 may include Node B and Radio Network Controllers (RNC).

The contactless smart card 214 is a pocket-sized card with embedded integrated circuits that process information. For example, the smart card 214 may wirelessly receive transaction information, process the information using embedded applications and wirelessly transmit a response. The contactless smart card 214 may wirelessly communicate with card readers through RFID induction technology at data rates of 106 to 848 kbit/s. The card 214 may wirelessly communicate with proximate readers between 10 cm (e.g., ISO/IEC 14443) to 50 cm (e.g., ISO 15693). The contactless smart card 214 operates independent of an internal power supply and captures energy from incident radio-frequency interrogation signals to power the embedded electronics. The smart card 214 may be a memory card or microprocessor card. In general, memory cards include only non-volatile memory storage components and may include some specific security logic. Microprocessor cards include volatile memory and microprocessor components. In some implementations, the smart card 214 can have dimensions of normally credit card size (e.g., 85.60×53.98×0.76 mm, 5×15×0.76 mm). In some implementations, the smart card 214 may be a fob or other security token. The smart card 214 may include a security system with tamper-resistant properties (e.g., a secure cryptoprocessor, secure file system, human-readable features) and/or may be configured to provide security services (e.g., confidentiality of stored information).

In some aspects of operation, the financial institution 106 may use the mobile host device 110 to communicate information to the transaction card 112. For example, the financial institution 106 may wirelessly communicate with the mobile host device 110 using the cellular core network 202. In some implementations, the financial institution 106 may transmit information to the mobile host device 110 in response to at least an event. The information may include, for example, transaction information (e.g., transaction receipt, transaction history), scripts, applications, Web pages, and/or other information associated with the financial institutions 106. The event may include completing a transaction, determining a transaction card 112 is outside the operating range of a POS terminal, receiving a request from a user of the mobile host device, and/or others. For example, the financial institution 106 may identify a mobile host device 110 associated with a card 112 that executed a transaction and transmit transaction information to the mobile host device 110 using the cellular core network 202. In using the cellular core network 202, the financial institutions 106 may transmit information to the transaction card 112 without requiring a POS terminal being proximate to the card 112. In addition or alternatively, the financial institution 106 may request information from the mobile host device 110, the transaction card 112 and/or the user using the cellular core network 202. For example, the financial institution 106 may transmit a request for transaction history to the card 112 through the cellular core network 202 and the mobile host device 110.

In some aspects of operation, a merchant or other entity may operate the mobile host device 110 c as a mobile POS terminal configured to wirelessly execute transactions with the smart card 214. For example, a vendor may be mobile (e.g., a taxi driver) and may include a mobile host device 110 c with a transaction card 112 c. In this example, the transaction card 112 c may wirelessly receive account information from the smart card 214 and the POS 114 may transmit an authorization request to the financial institution 106 using the mobile host device 110 and the cellular core network 202. In response to at least the request, the financial institution 106 may generate an authorization response to the transaction card 112 c using the mobile host device 110 and the cellular network 202.

In some implementations, the system 100 may execute one or more of the modes discussed with respect to FIG. 1. For example, the transaction card 112 may be re-personalized/updated using the cellular radio technology of the mobile host device 110. The user may want to re-personalize the transaction card 112 to change host devices, to have multiple host devices, and/or other reasons. In regards to the software device management, the user may transmit to the financial institution 106 a request to re-personalize the transaction card 112 using the cellular radio technology of the host device 110.

FIG. 3 illustrates is a block diagram illustrating an example transaction card 112 of FIG. 1 in accordance with some implementations of the present disclosure. In general, the transaction card 112 includes personalized modules that execute financial transactions independent of the mobile device 110. The illustrated transaction card 112 is for example purposes only, and the transaction card 112 may include some, all or different modules without departing from the scope of this disclosure.

In some implementations, the transaction card 112 can include an interface layer 302, an API/UI 304, a Web server 306, a real-time framework 308, payment applications 310, value added applications 312, user credentials 314, real-time OS 316, contactless chipset 318, antenna control functions 320, antenna 322, bank used memory 324, and free memory 326. In some implementations, a host controller includes the interface layer 302, he API/UI 304, the Web server 306, the real-time framework 308, the contactless chipset 318, and the antenna control functions 320. In some implementations, a security module includes the payment applications 310 and the user credentials 314. The bank used memory 324 and free memory 326 may be contained in Flash. In some implementations, the contactless chipset 318 may be integrated within the security module or operated as a standalone. The antenna 322 may be electronic circuitry.

The interface layer 302 includes interfaces to both the host device, i.e., physical connection, and the external world, i.e., wireless/contactless connection. In payment implementations, the wireless connection can be based on any suitable wireless standard such as contactless (e.g., ISP 14443 A/B), proximity (e.g., ISO 15693), NFC (e.g., ISO 18092), and/or others. In some implementations, the wireless connection can use another short range wireless protocol such as Bluetooth, another proprietary interfaces used by retail payment terminals (Felica in Japan, MiFare in Asia, etc.), and/or others. In regards to the physical interface, the interface layer 302 may physically interface the mobile device 110 using an SD protocol such as MicroSD, Mini-SD or SD (full-size). In some implementations, the physical interface may include a converter/adapter to convert between two different protocols based, at least in part, on the mobile device 110. In some implementations, the mobile device 110 may communicate using protocols such as USB, MMC, iPhone proprietary interface, or others.

The API/UI layer 304 can include any software, hardware, and/or firmware that operates as an API between the mobile device 110 and the transaction card 112 and as the GUI 111. Prior to executing transactions, the transaction card 112 may automatically install drivers in the mobile device 110 in response to at least insertion. For example, the transaction card 112 may automatically install a MicroSD device driver in the device 110 to enable the transaction card 112 to interface the mobile device 110. In some implementations, the transaction card 112 may install an enhanced device driver such as a Mass Memory with Radio (MMR) API. In this implementation, the interface can drive a class of plug-ins that contain mass memory as well as a radio interface. The MMR API may execute one or more of the following: connect/disconnect to/from the MMR controller (Microcontroller in the plug-in); transfer data using MM protocol (e.g., SD, MMC, XD, USB, Firewire); send encrypted data to the MMR controller; receive Acknowledgement of Success or Error; received status word indicating description of error; turn radio on/off; send instruction to the transaction card 112 to turn the antenna on with specifying the mode of operation (e.g., sending mode, listening mode); transmit data such as send instruction to controller to transmit data via the radio; listen for data such as send instruction to controller to listen for data; read data such as send instruction to controller to send the data received by the listening radio; and/or others. In some implementations, MMR can be compliant with TCP/IP. In some implementations, API encapsulated ISO 7816 commands may be processed by the security module in addition to other commands.

In some implementations, the API can operate in accordance with the two processes: (1) the transaction card 112 as the master and the mobile device 110 as the slave; and (2) the card UI as the master. In the first process, the transaction card 112 may pass one or more commands to the mobile device 110 in response to, for example, insertion of the transaction card 112 into a slot in the mobile device 110, a transaction between the transaction card 112 and the POS 114, and/or other events. In some implementations, the transaction card 112 can request the mobile device 110 to execute one or more of following functions: Get User Input; Get Signature; Display Data; Send Data; Receive Data; and/or others. The Get User Input command may present a request through the GUI 111 for data from the user. In some implementations, the Get User Input may present a request for multiple data inputs. The data inputs may be any suitable format such as numeric, alphanumeric, and/or other strings of characters. The Get Signature command may request the mobile device 110 to return identification data such as, for example, a phone number, a device ID like an IMEI code or a MAC address, a network code, a subscription ID like the SIM card number, a connection status, location information, Wi-Fi beacons, GPS data, and/or other device specific information. The Display Data command may present a dialog to the user through the GUI 111. In some implementations, the dialog can disappear after a period of time, a user selection, and/or other event. The Send Data command may request the mobile device 110 to transmit packet data using its own connection to the external world (e.g., SMS, cellular, Wi-Fi). The Receive Data command may request the mobile device 110 to open a connection channel with certain parameters and identify data received through the connection. In some implementations, the command can request the mobile device 110 to forward any data (e.g., SMS) satisfying certain criteria to be forwarded to the transaction card 112.

In regards to the UI as master, the UI may execute one or more of the following commands: security module Command/Response; Activate/Deactivate; Flash Memory Read/Write; Send Data with or without encryption; Receive Data with or without decryption; URL Get Data/URL Post Data; and/or others. The security module commands may relate to security functions provided by the card and are directed towards the security module within the transaction card 112 (e.g., standard ISO 7816 command, proprietary commands). In some implementations, the commands may include encryption, authentication, provisioning of data, creation of security domains, update of security domain, update of user credentials after verification of key, and/or others. In some implementations, the commands may include non security related smart card commands such as, for example, read transaction history commands. The read transaction history command may perform a read of the secure memory 324 of the transaction card 112. In some implementations, certain flags or areas of the secure memory 324 may be written to after security verification. The Activate/Deactivate command may activate or deactivate certain functions of the transaction card 112. The Flash Memory Read/Write command may execute a read/write operation on a specified area of the non-secure memory 326. The Send Data with or without encryption command may instruct the transaction card 112 to transmit data using its wireless connection with, for example, the POS 114. In addition, the data may be encrypted by the transaction card 112 prior to transmission using, for example, keys and encryption capability stored within the security module. The Receive Data with or without decryption command may instruct the transaction card 112 to switch to listening mode to receive data from its wireless connection with the terminal/reader (e.g., POS 114). In some implementations, data decryption can be requested by the security module using, for example, keys and decryption algorithms available on the security module, i.e., on-board decryption. The URL Get Data/URL Post Data command may instruct the web server 306 to return pages as per offline get or post instructions using, for example, offline URLs.

The Web server 306, as part of the OS of the transaction card 112, may assign or otherwise associate URL style addressing to certain files stored in the memory 326 (e.g., flash) of the transaction card 112. In some implementations, the Web server 306 locates a file using the URL and returns the file to a browser using standard HTTP, HTTPS style transfer. In some implementations, the definition of the files can be formatted using standard HTML, XHTML, WML and/or XML style languages. The file may include links that point to additional offline storage locations in the memory 326 and/or Internet sites that the mobile device 110 may access. In some implementations, the Web server 306 may support security protocols such as SSL. The Web server 306 may transfer an application in memory 326 to the mobile device 111 for installation and execution. The Web server 306 may request the capabilities of the browser on the device 110 using, for example, the browser user agent profile, in order to customize the offline Web page according to the supported capabilities of the device and the browser, such as, for example, supported markup language, screen size, resolution, colors and such.

As part of the Real time OS, the real-time framework 308 may execute one or more functions based, at least in part, on one or more periods of time. For example, the real-time framework 308 may enable an internal clock available on the CPU to provide timestamps in response to at least requested events. The real-time framework 308 may allow certain tasks to be pre-scheduled such that the tasks are executed in response to at least certain time and/or event based triggers. In some implementations, the real-time framework 308 may allow the CPU to insert delays in certain transactions. In some implementation, a part of WAP standards called WTAI (Wireless Telephoney Application Interface) can be implemented to allow offline browser pages on the card 112 to make use of functions offered by the mobile device 110 (e.g., send/receive wireless data, send/receive SMS, make a voice call, play a ringtone etc.).

The payment applications 310 can include any software, hardware, and/or firmware that exchanges transaction information with the retail terminal using, in some instances, a pre-defined sequence and/or data format. For example, the payment applications 310 may generate a response to a transaction request by selecting, extracting or otherwise including user credentials in the response, in a format compatible with the retail terminal's payment processing application. In some implementations, the payment applications 310 may execute one or more of the following: transmit properties of the transaction card 112 in response to at least an identification request received from the POS 114; receive a request to execute a transaction from, for example, the POS 114; identify user credentials in the bank-used memory 324 in response to at least the request; generate a transaction response based, at least in part, on the user credentials; transmit the transaction response to the POS 114 using, for example, a contactless chipset; receive clear data, for example a random number, from the POS 114 and provide a response containing encrypted data by encrypting the clear data using the cryptographic capabilities of the secure element; transmit the encrypted data using the contactless chipset 318; increment a transaction counter with every transaction request received; transmit a value of the transaction counter in response to a request from the POS 114; store details of the transaction request received from the POS 114 into the transaction history area of the bank used memory 324; transmit transaction history to the CPU of the intelligent card 112 in response to such a request; receive ISO 7816 requests from the CPU of the intelligent card 112; execute corresponding transactions using the secure element OS; provide responses back to the CPU; and/or other processes. In generating the transaction response, the payment application 310 may generate the response in a format specified by the payment network (VISA, MasterCard, Amex, Discover) associated with a financial institution 106 or a proprietary format owned and defined by the financial institution 106 and processible by the POS 114. The transaction request may include one or more of the following: user credentials (e.g., account number); expiry data, card verification numbers; a transaction count; and/or other card or user information. In some implementations, the payment application 310 may comprises a browser application to enable transactions. The browser application 310 may be a browser that may be installed if the device 110 is either missing a browser or has a browser that is incompatible with the Web server 306 on the card 112. After installation of such browser 310, future communications between the mobile device 110 and the web-server 306 make use the newly installed browser.

The real-time OS 316 may execute or otherwise include one or more of the following: real-time framework 308; a host process that implements the physical interface between the transaction-card CPU and the mobile device 110; an interface that implements the physical interface between the transaction-card CPU and the security module; a memory-management process that implements the ISO 7816 physical interface between the transaction-card CPU and the memory 324 and/or 326; an application-layer process that implements the API and UI capabilities; the Web server 306; antenna-control functions 320; power management; and/or others. In some implementations, the real-time OS 316 may manage the physical interface between the transaction-card CPU and the secure memory 324 that includes memory segmentation to allow certain memory areas to be restricted access and/or data buffers/pipes. In some implementations, the security module can include a security module OS provided by the security module Vendor and may be compliant with Visa and MasterCard specifications. The security module OS may structure the data in the security module to be compliant with Paypass and/or payWave specifications or any other available contactless retail payment industry specifications. In addition, the security module may store host device signatures and allow modes of the antenna 322 in the secure element 324. In some implementations, the real-time OS 316 may include a microcontroller OS configured to personalizing the secure element 324 such as by, for example, converting raw FV data (account number, expiry date, Card Verification Number (CVN), other application specific details) into secure encrypted information. In addition, the microcontroller OS may present the card 112 as a MicroSD mass storage to the host device. The microcontroller OS may partition the memory into a user section and a protected device application section. In this example, the device application section may be used to store provider specific applications that either operate from this segment of the memory or are installed on the host device from this segment of the memory.

The security module chip may provide tamper-resistant hardware security functions for encryption, authentication, management of user credentials using multiple security domains, on-board processing capabilities for personalization, access and storage, and/or others. In some implementations, the security module chip can include the contactless chipset 318.

The contactless chipset 318 may provides the hardware protocol implementation and/or drivers for RF communication. For example, the contactless chipset 318 may include on-board RF circuitry to interface with an external world connection using a wireless/contactless connection. The wireless connection may be, for example, client to node (terminal/reader/base station), node to client (passive tag), or peer to peer (another transaction card 112).

The antenna control function 320 may controls the availability of the RF antenna. For example, the antenna control function 320 may activate/deactivate the antenna 322 in response to, for example, successful authentication, completion of a routine established by the OS 316, and/or other event. The antenna 322 may be a short range wireless antenna connected to an NFC inlay via a software switch such as a NAND Gate or other element.

FIG. 4 is a block diagram illustrating an example intelligent card 400 in accordance with some implementations of the present disclosure. For example, the transaction card of FIG. 1 may be implemented in accordance with the illustrated intelligent card 400. In general, the intelligent card 400 may independently access services and/or transactions. The intelligent card 400 is for illustration purposes only and may include some, all, or different elements without departing from the scope of the disclosure.

As illustrated, the intelligent card 400 includes an antenna 402, a switch plus tuning circuit 404, a security module and contactless chipset 406, a CPU 408 and memory 410. The antenna 402 wirelessly transmits and receives signals such as NFC signals. In some implementations, the switch plus tuning circuit 404 may dynamically adjust the impedance of the antenna 402 to tune the transmit and/or receive frequency. In addition, the switch plus tuning circuit 404 may selectively switch the antenna 402 on and off in response to at least a command from the CPU 408. In some implementations, the antenna 402 can be a short range wireless antenna connected to an NFC inlay via a software switch such as an NAND Gate or other element to allow for code from the CPU 408 to turn the antenna 402 on and off In some implementations, the card 400 may include an NFC inlay (not illustrated) that can be a passive implementation of NFC short range wireless technology deriving power from the reader terminal in order to transmit data back or a stronger implementation using an eNFC chipset to power active reader mode and self-train mode. In addition, the card 400 may include an external needle point reset (not illustrated) that prompts the CPU 408 to depersonalize the memory or secure element.

The CPU 408 may transmit the switching command in response to an event such as a user request, completion of a transaction, and/or others. When switched on, the security chip and contactless chipset 406 is connected to the antenna 402 and executes one or more of the following: format signals for wireless communication in accordance with one or more formats; decrypt received messages and encrypt transmitted messages; authenticate user credentials locally stored in the memory 410; and/or other processes. The memory 410 may include a secure and non-secured section. In this implementation, the secure memory 410 may store one or more user credentials that are not accessible by the user. In addition, the memory 410 may store offline Web pages, applications, transaction history, and/or other data. In some implementations, the memory 410 may include Flash memory from 64 MB to 32 GB. In addition, the memory 410 may be partitioned into user memory and device application memory. The chipset 406 may include a security module that is, for example Visa and/or MasterCard certified for storing financial vehicle data and/or in accordance with global standards. In addition to a user's financial vehicle, the secure element may store signatures of allowed host devices and/or antenna modes.

In some implementations, the CPU 408 may switch the antenna 402 between active and inactivate mode based, at least in part, on a personalization parameter defined by, for example, a user, distributor (e.g., financial institution, service provider), and/or others. For example, the CPU 408 may activate the antenna 402 when the intelligent card 400 is physically connected to a host device and when a handshake with the host device is successfully executed. In some implementations, the CPU 408 may automatically deactivate the antenna 402 when the intelligent card 400 is removed from the host device. In some implementations, the antenna 402 is always active such that the intelligent card 400 may be used as a stand-alone access device (e.g., device on a keychain). In regards to the handshaking process, the CPU 408 may execute one or more authentication processes prior to activating the intelligent card 400 and/or antenna 402 as illustrated in FIG. 7. For example, the CPU 408 may execute a physical authentication, a device authentication, and/or a user authentication. For example, the CPU 408 may activate the antenna 402 in response to at least detecting a connection to the physical interface with the host device (e.g., SD interface) and successful installation of the device driver for mass memory access (e.g., SD device driver) on the host device. In some implementations, device authentication may include physical authentication in addition to a signature comparison of a device signature stored in memory (e.g., security module (SE)) that was created during first-use (provisioning) to a run-time signature calculated using, for example, a unique parameter of the host device. In the event no host device signature exists in the memory, the CPU 408 may bind with the first compatible host device the card 400 is inserted into. A compatible host device may be a device that can successfully accomplish physical authentication successfully. If a host-device signature is present in the memory, the CPU 408 compares the stored signature with the real-time signature of the current host device. If the signatures match, the CPU 408 may proceed to complete the bootstrap operation. If the signatures do not match, host device is rejected, bootstrap is aborted and the card 400 is returned to the mode it was before being inserted into the device.

User authentication may include verification of physical connection with a user using a PIN entered by the user, a x.509 type certificate that is unique to the user and stored on the host device, and/or other processes. Device and user authentication may verify a physical connection with device through comparison of a device signature and user authentication through verification of user PIN or certificate. In some implementations, the user can select a PIN or certificate at provisioning time. If this case, the CPU 408 may instantiate a software plug-in on the host device. For example, a software plug-in may request the user for his PIN in real time, read a user certificate installed on the device (e.g., x.509), and/or others. The operation of the software plug-in may be customized by the provider. Regardless, the returned user data may be compared with user data stored in the memory. In case of a successful match, the antenna 402 may be activated. In case of an unsuccessful match of a certificate, then card 400 is deactivated. In case of unsuccessful PIN match, the user may be requested to repeat PIN attempts until a successful match or the number of attempts exceeds a threshold. The disk provider may customize the attempt threshold.

In regards to network authentication, the host device may be a cellphone such that the card 400 may request network authentication prior to activation. For example, the card 400 may be distributed by a Wireless Network Operator (WNO) that requires a network authentication. In this example, a flag in memory may be set to ON indicating that network authentication is required. If the flag is set to ON, a unique identity about the allowed network is locally stored in memory such a Mobile Network Code for GSM networks, a NID for CDMA networks, a SSID for broadband networks, and/or identifiers. If this flag is ON, the CPU 408 in response to at least insertion may request a special software plug-in to be downloaded to the host device and instantiated. This software plug-in may query the host device to respond with network details. In some cases, the type of unique network identity employed and the method to deduce it from the host device may be variable and dependent on the network provider and capability of the host device. If the locally-stored ID matches the request ID, the CPU 408 activated the antenna 402 to enable access or otherwise services are denied.

FIGS. 5A and 5B illustrate an example transaction card 112 in accordance with some implementations of the present disclosure. In the illustrated implementation, the transaction card 112 includes a shape and dimensions exactly the same or substantially similar to a standard MicroSD card. The transaction card 112 includes an antenna 502 for wirelessly communicating with, for example, retail terminals (e.g., POS 114) using RF signals and an SD interface 506 for physically interfacing a device (e.g., mobile device 110). The antenna 502 may be a flat coil (e.g., copper coil) integrated on one or more layers the MicroSD transaction card 112, a printed circuit (e.g., copper circuit) etched on one or more layers of the MicroSD transaction card 112, and/or other configuration for wirelessly transmitting and receiving RF signals. In some implementations, the antenna 502 may be substantially planar and adjacent at least a portion of the housing 508 of the transaction card 112 (e.g., top, bottom). The antenna 502 may include a width in the range of approximately 9 mm and a length in the range of approximately 14 mm. As illustrated in FIG. 5B, the antenna 502 is connected to a transaction circuit 510 (e.g., a contactless chipset) using, for example, a tuning circuit that tunes the antenna 502 to one or more frequencies. The one or more frequencies may be based, at least in part, on the terminal and/or type of terminal (e.g., POS 114). For example, the tuning circuit may tune the antenna 502 to 13.56 MHz for ISO 14443 related transactions. In some implementations, the antenna 502 may include insulation, using material, for example, ferrite, to substantially prevent signals from interfering with the circuit 510, mobile device 110, battery elements, and/or other elements that may be proximate to the transaction card 112. The transaction card 112 may include an amplifier circuit 504 to amplify (e.g., a factor of 10) signals generated by the antenna 502. In some implementations, the amplifier 504 may be of two types. For example, the amplifier 504 may be a passive amplifier that uses passive circuitry to amplify the RF signals received by the antenna (see FIGS. 13A and 13B) and/or a powered active amplifier that uses the energy from the battery of the host device to operate the transaction circuit (see FIG. 14A and FIG. 14B). In some implementations, the transaction card 112 may contain two additional RF interface pins 509A and 509B to allow the transaction card to use an external antenna, for example, an antenna contained in a separate housing for transactions and/or personalization.

FIGS. 6A and 6B illustrate another example of the transaction card 112 in accordance with some implementations of the present disclosure. In the illustrated implementation, the transaction card 112 includes a three-dimensional antenna 602. For example, the antenna 602 may include a shape that is substantially helical such as a three-dimensional antenna coil. In addition, the transaction card 112 may include a housing 608 enclosing the antenna 602 and a transaction circuit 610. As illustrated in FIG. 6B, the antenna 602 may include a core 608 that substantially defines a length and a width of a three-dimensional shape of the antenna 602. In some implementations, the core 608 may comprise a middle segment of the transaction card 112 such that the width of the antenna coil 602 is substantially similar to the transaction card 112. The core 608 may reflect at least some wireless signals to substantially isolate the magnetic field from the transaction circuit 610, the mobile device 110, battery elements, and/or other elements proximate the antenna 602 in such a way that the magnetic field is concentrated in a direction substantially pointing away from the host device. The illustrated antenna 602 can be connected to the transaction circuit 610 (e.g., contactless chipset). In some implementations, the antenna 602 may be connected to a tuning circuit that substantially tunes the antenna 602 to one or more frequencies compatible with, for example, a retail terminal 114. For example, the tuning circuit may tune the antenna 602 to 13.56 MHz for ISO 14443 related transactions. The transaction card 112 may include an amplifier circuit 604 to amplify (e.g., a factor of 10) wireless signals generated by the antenna 602. In some implementations, the amplifier 604 may be of two types. For example, the amplifier 604 may be a passive amplifier that uses passive circuitry to amplify the RF signals received by the antenna (see FIGS. 13A and 13B) and/or a powered active amplifier that uses the energy from the battery of the host device to operate the transaction circuit (see FIG. 14A and FIG. 14B).

FIGS. 7A and 7B illustrate an example transaction card 112 including an external antenna 702 in accordance with some implementations of the present disclosure. In the illustrated implementation, the transaction card 112 can include an antenna 702 enclosed in a resilient member 704 and external to a housing 706 of the transaction card 112. The antenna 702 and the resilient member 704 may extend outside the SD slot during insertion of the housing 706. In some cases, the housing 706 may be substantially inserted into the slot of the device (e.g., mobile device 110). In the illustrated implementation, the housing 706 can include a shape and dimensions exactly the same or substantially similar to a standard MicroSD card. The antenna 702 wirelessly communicates with, for example, retail terminals (e.g., POS 114) using RF signals. In addition, the transaction card 112 may include an SD interface 710 for physically interfacing a device (e.g., mobile device 110). The antenna 702 may be a substantially planar coil (e.g., copper coil) integrated into one or more layers, a printed circuit (e.g., copper circuit) etched into one or more layers, and/or other configuration for wirelessly transmitting and receiving RF signals. The enclosed antenna 702 and the housing 706 may form a T shape. In some implementations, the antenna 702 may be substantially planar and adjacent at least a portion of the housing 708 of the transaction card 112 (e.g., top, bottom). The antenna 702 may include a width in the range of approximately 9 mm and a length in the range of approximately 14 mm. The resilient member 704 may be rubber, foam, and/or other flexible material. In some implementations, a flat, cylindrical or other shaped block of ceramic antenna may be used instead of the resilient member 704 and antenna 702. As illustrated in FIG. 7B, the antenna 702 is connected to a transaction circuit 710 (e.g., a contactless chipset) using, for example, a tuning circuit that tunes the antenna 702 to one or more frequencies. The one or more frequencies may be based, at least in part, on the terminal and/or type of terminal (e.g., POS 114). For example, the tuning circuit may tune the antenna 702 to 13.56 MHz for ISO 14443 related transactions. In some implementations, the antenna 702 may include insulation using material, for example, ferrite, to substantially isolate and direct magnetic field signals away from interfering with the circuit 710, mobile device 110, battery elements, and/or other elements that may be proximate to the transaction card 112 in such a way that the magnetic field is concentrated in a direction substantially pointing away from the host device slot in which the transaction card is inserted. The transaction card 112 may include an amplifier circuit 712 to amplify (e.g., a factor of 10) signals generated by the antenna 702. In some implementations, the amplifier 712 may be of two types. For example, the amplifier 712 may be a passive amplifier that uses passive circuitry to amplify the RF signals received by the antenna (see FIGS. 13A and 13B) and/or a powered active amplifier that uses the energy from the battery of the host device to operate the transaction circuit (see FIG. 14A and FIG. 14B).

FIGS. 8A-C illustrate an example transaction card 112 including an external three-dimensional antenna 802 in accordance with some implementations of the present disclosure. In the illustrated implementation, the transaction card 112 can include an antenna 802 enclosed in a resilient member 804 and external to a housing 806 of the transaction card 112. The antenna 802 and the resilient member 804 may extend outside the SD slot receiving the housing 806. In some cases, the housing 806 may be substantially inserted into the slot of the device (e.g., mobile device 110). In the illustrated implementation, the housing 806 can include a shape and dimensions exactly the same or substantially similar to a standard MicroSD card. The antenna 802 wirelessly communicates with, for example, retail terminals (e.g., POS 114) using RF signals. In addition, the transaction card 112 may include an SD interface 808 for physically interfacing a device (e.g., mobile device 110). The member 804 may include an arcuate outer surface and/or a substantially flat surface that abuts a portion of the housing 806. As illustrated in FIG. 8C, the antenna 802 may include a core 810 that substantially defines a length and a width of a three-dimensional shape of the antenna 802. The core 810 may reflect at least some wireless signals to substantially isolate the magnetic field from the transaction card 112, the mobile device 110, battery elements, and/or other elements proximate the antenna 802 in such a way that the magnetic field is concentrated in a direction substantially pointing outside the host device. In some implementations, the core 810 may include a cylindrical ferrite core around which the antenna 802 of the transaction card 112 is wrapped. In some implementations, the core 810 may substantially reflect signals away from the transaction card circuitry, mobile device 110, battery elements, and/or other elements that may be proximate to the transaction card 112 in such a way that the magnetic field is concentrated in a direction substantially pointing away from the host device. The antenna 802 may include a width in a range of 9 mm and a length in a range of 14 mm. The resilient member 804 may be rubber, foam, and/or other flexible material. As illustrated in FIG. 8B, the antenna 802 is connected to a transaction circuit 810 (e.g., a contactless chipset) using, for example, a tuning circuit that tunes the antenna 802 to one or more frequencies. The one or more frequencies may be based, at least in part, on the terminal and/or type of terminal (e.g., POS 114). For example, the tuning circuit may tune the antenna 702 to 13.56 MHz for ISO 14443 related transactions. The transaction card 112 may include an amplifier circuit 812 to amplify (e.g., a factor of 10) signals generated by the antenna 802. In some implementations, the amplifier 812 may be of two types. For example, the amplifier 812 may be a passive amplifier that uses passive circuitry to amplify the RF signals received by the antenna (see FIGS. 13A and 13B) and/or a powered active amplifier that uses the energy from the battery of the host device to operate the transaction circuit (see FIG. 14A and FIG. 14B). In some implementations, the transaction card 112 may contain two additional RF interface pins 814 a and 814 b to allow the transaction card to use an external antenna, for example, an antenna contained in a separate housing for transactions and/or personalization.

FIGS. 9A-9D illustrate an example transaction card 112 an antenna element 902 and a card element 904. In the illustrated implementations, the card element 904 can be inserted into the antenna element 902 to form the transaction card 112. The antenna element 902 may include an antenna 906 enclosed in a resilient member 908 as illustrated in FIG. 9B and include antenna connections 910 for connecting the antenna 906 to the card element 904. The card element 904 may include card connections 916 corresponding to the antenna connections 910 that connect to, for example, the contactless chipset. By selectively positioning the antenna element 902 and the card element 904, the antenna connections 910 may abut the card connections 916 to form an electrical connection between the two elements. In addition to an electric connection, this connection may also provide a mechanical lock between the antenna element 902 and the card element. Once attached, the contactless chipset may be connected to the antenna 906 using a tuning circuit that tunes the antenna 906 to one or more frequencies for wireless communicating with, for example, the retail terminal 114. For example, the tuning circuit may tune the antenna 906 to 13.56 MHz for ISO 14443 related transactions.

In some implementations, the card element 904 can include a width and a thickness the same or substantially the same as a standard MicroSD card such that at least a portion of the card element 904 may be inserted into a standard MicroSD slot. In some instances, the card element 904 may be 3-5 mm longer than a standard MicroSD card. The card element 904 may include a head protrusion that is slightly wider and/or thicker than a main body of the card element 904. The antenna element 902 typically extends outside of the MicroSD slot after insertion of the card element 904. In some implementations, the antenna element 902 may include a rounded curvature facing away from the slot during insertion and a flat surface on the other side. In some implementations, the antenna element 902 may form an opening having a width approximately 1-2 mm wide. The width of the opening may be approximately equal to the thickness of the main body of the card element 904. In some implementations, the width of the opening may match the thickness of the head protrusion of the card element 904. In the protrusion example, the thinner side of the card element 904 may be initially inserted into the antenna element 902. In some implementations, the head protrusion of the card element 904 after insertion may be substantially flush with the opening. In this instance, the antenna element 902 and the card element 904 may form a cap with flat ends connected by a curvature. The antenna element 902 may be soft rubber, foam, and/or other material that may conform to portions of an SD slot during insertion of the card element 904. The antenna 906 may be a flexible PCB including a thin copper antenna coil that is etched and/or mounted to form the antenna 906. In some implementations, the card element 904 may include a notch 914 for receiving a portion of the antenna element 902 such as the protrusion 912. In this case, the notch 914 and the protrusion 912 may substantially secure the card element 904 in the antenna element 902.

FIGS. 10A and 10B illustrates another implementation of the transaction card 112. In the illustrated implementation, the transaction card 112 includes an antenna element 1002 connected to a card element 1004. The card element 1004 may include the same or substantially the same dimensions as a standard MicroSD card such that the card element 1004 may be inserted into an SD slot. The antenna element 1002 may be attached to a surface of, for example, a mobile device 110. In the illustrated element, the antenna element 1002 includes a base 1005 affixed to a surface and configured to receive a pad 107. For example, the base 1005 may be configured to secure the pad 107 adjacent a surface of the mobile device 110 as illustrated in FIG. 10B. In some implementations, the base 1005 may include an adhesive plastic base including a detachable perforation 1006. The pad 1007 may extend around a mobile device and attaches to the base 1005. In some examples, the base 1005 and the pad 1007 may form a thin and flat sticker on the surface of the phone. The pad 1007 may include an antenna 1003, a non-adhesive pad 1008, and/or peripherals elements 1010. The outside portion of the pad 1007 may include a plastic inlay enclosing the antenna 1003 of the transaction card 112. The antenna 1003 may include copper coils etched on a very thin plastic film forming one of the layers of the inlay. The antenna 1003 may be connected to the contactless chipset of the card element 1004 using a connector 1012 (e.g., a flexible thin film) that wraps around the edge of the mobile device 110. The connector 1012 may connect the antenna 1003 to the contactless chipset using a tuning circuit that tunes the antenna 1003 to one or more frequencies compatible with, for example, the retail terminal 114. For example, the tuning circuit may tune the antenna 1003 to 13.56 MHz for ISO 14443 related transactions. The base 1005 may include a ferrite material that substantially isolates RF analog signals and the magnetic field from the mobile device 110 (e.g., circuits, battery) in which case the connector may include additional connectivity wires than those used for antenna connection only. The pad 1007 may also contain another peripheral 1010 such as a fingerprint scanner connected to a corresponding logical element in the card element 1004 using the same connector 1014.

FIGS. 11A and 11B illustrate an example transaction card 112 including a wireless connection between an antenna element 1102 and a card element 1104. For example, the antenna element 1102 and the card element 1104 may include a wireless connection such as Bluetooth. The card element 1104 may include the same shape and dimensions as a standard MicroSD card such that the card element 1104 is substantially in an SD slot during insertion. The antenna element 1102 may be affixed to a surface of a device housing the card element 1104. In some implementations, the antenna element 1102 can form a thin and flat sticker on the surface of the mobile device 110 as illustrated in FIG. 11B. The antenna element 1102 may include a plastic inlay enclosing at least a portion of the antenna 1104. The antenna 1104 may include a copper coil etched on a very thin plastic film forming one or more layers of the inlay. The antenna 1104 may connect to the card element 1104 (e.g., the contactless chipset) using a wireless pairing connection 1113 between a transceiver chip 1114 in the card element 1114 and a corresponding transceiver chip 1108 in the antenna element 1108. The wireless connection 1113 may connect the antenna 1104 to the card element 1104 using a tuning circuit that tunes the antenna 1104 to one or more frequencies compatible with, for example, the retail terminal 114. The wireless pairing connection used in this case may be in the high frequency spectrum (e.g., 900 Mhz, 2.4 GHz), which are unlicensed and free for use by domestic appliances, for example. For example, the tuning circuit may tune the antenna 1104 to 13.56 MHz for ISO 14443 related transactions. The antenna element 1102 may include a ferrite material that reflects wireless signals to substantially prevent interference with the mobile device 1110. The antenna element 1102 may also contain another peripheral 1110 such as a fingerprint scanner wirelessly connected to a corresponding logical element in the card element using the same wireless connection 1113.

FIGS. 12A and 12B illustrate example transaction cards 112 using a circuit board 1202 of a mobile device to receive and transmit wireless RF signals. Referring to FIG. 12A, the transaction card 112 includes a plurality of connections 1210 to the circuit board 1202 to interface the mobile device 110. Typically, the circuit board 1202 includes interconnecting copper wires that communicate digital signals. In some implementations, the circuit board 1202 may communicate analog signals in addition to the digital signals such as RF signals. In these instances, the transaction card 112 may include a frequency filter circuit 1206 to filter out RF signals (e.g., 13.56 MHz) transmitted by a retail terminal and received by the circuit board 1202. In addition to receiving RF signals, the transaction card 112 may communicate an analog RF signal to the circuit board 1202 to transmit RF signals to the retail terminal. In some implementations, the transaction card 112 may contain two additional RF interface pins 1212 a and 1212 b to allow the transaction card to use an external antenna, for example, an antenna contained in a separate housing for personalization and/or transaction.

Referring to FIG. 12B, the circuit board 1202 includes an external antenna 1214 that may be used by the transaction card 112. In this case, the original SD interface PINs 1210 may be used for the sole purpose of standard SD host communication. The external antenna 1214 may be embedded in, affixed to or otherwise included on the board 1202. The external antenna 1214 are connected to the pins 1216 a and 1216 b on the circuit board 1202 such that when the transaction card 112 is inserted into the mobile device the card 112 is connected to the external antenna 1214. In some implementations, the pins 1212 a and pins 1212 b can connect to two the pins 1216 a and 1216 b on the handset circuit board 1202, which are in turn connected to the antenna 1214 tuned to receive reader signals. The pins 1216 are positioned on the handset board 1202 such that upon insertion of, for example, the MicroSD in the phone, 1212 a connects to 1216 a and 1212 b connects to 1216 b. In these implementations, the transaction card 112 can exchange RF signals with the reader using the handset antenna 1214 and the pins 1212 and 1216.

FIGS. 13A and 13B illustrate cross sectional views 1800 a and 1800 b, respectively, of card systems 1302 a and 1302 b that passively amplify RF signals. In general, passive in this context means amplifying received RF signals without power, electricity, and/or moving parts. An active device would thus use power, electricity, or moving parts to perform work. As illustrated, the card system 1302 includes a transaction card 112 and a card element 1303 a. The transaction card 112 may be inserted into an opening formed by the card element 1303. As illustrated, the card is inserted into a side of the card element 1303. Though, the card element 1303 may form other opening without departing from the scope of the disclosure such as an opening in the top surface. Both implementations of the card element 1303 include an antenna 1306 connected to an SD pin connector 1307. In these instances, the transaction card 112 connects to the antenna 1306 using the SD pin connector 1307. Each card system 1302 includes a passive amplification module 1304 that amplifies received RF signals using passive components. For example, the passive amplification module 1304 may include one or more diodes, one or more resistors, one or more capacitors, and/or other components to passively amplify received RF signals (e.g., a single diode). Each transaction card includes a transaction circuit 1308 and an associated virtual ground 1310. The antenna 1306 is connected to the transaction circuit 1308 through the SD pin connector 1307 and passes received RF signals to the transaction circuit 1308. The passive amplification module 1304 connects to both a lead of the antenna 1306 and the virtual ground 1310 of the RF front end 1308. More specifically and for example, the antenna lead to which the passive amplification module 1304 connects to, is the lead that carries the modulation signals for data transfer. As previously mentioned, the passive amplification module 1304 amplifies received RF signals. For example, the passive amplification module 1304 may amplify the signal by a factor of about 10.

Referring to FIG. 13A, the transaction card 112 may include the passive amplification module 1304 a and connect to the lead of the antenna 1306 within the housing of the card 112. In these implementations, the card element 1303 may only include the SD pin connector 1307 and the antenna 1306. Referring to FIG. 13B, the passive amplification module 1304 b resides in the card element 1303. In these implementations, the transaction card 112 may include an additional pin 1312 that connectors to the virtual ground 1310 b when the card 112 is inserted in the card element 1303 b. In other words, the card element 1303 may house, enclose, or otherwise include the passive amplification module 1304 b, the SD pin connector 1307 b, and the antenna 1306 b.

Referring 13C, the profile 1320 illustrates a side view of the card system 1302. In the illustrated implementation, the card system 1302 include a first portion 1324 with a first thickness indicated by th₁ and a second portion 1326 with a second thickness indicated by th₂. In some implementations, the first thickness may be approximately a width of a credit card such as, for example, 0.76 mm and/or other widths that comply with standards such as ISO 7810, ID1 and CR80. In some implementations, the second thickness may be at least a thickness of an SD card such as, for example, between about 1 mm and 2.1 mm. In addition, the card system 1302 includes a first width (w₁) indicating a width of the card element 1303, a second width (w₂) indicating a width of the second portion 1326, and a third width (w₃) indicating a width associated a portion 1324 used during the personalization process. In some implementations, the first width may be approximately the same width as a standard credit card in accordance with ISO/IEC 7810 standard. In some implementations, the second width may be at least a width of a microSD card such as, for example, about 11 mm, 20 mm, or 24 mm. The third width may be sufficient to personalize the transaction card 112 using standard personalization machines when inserted into the card element 1303. In some implementations, the third width may be sufficient to receive a mag stripe such as about 9.52 mm. In addition, the third width may be sufficient for graphical personalization such as embossing an account number, name, and expiration date. In these instances, the third width may be sufficient to affix a mag stripe, a signature strip, and/or printing characters. In some implementations, the outer edge identified by w₃ may be compatible with current personalization without requiring physical modification.

FIGS. 14A and 14B illustrate cross sections 1400 a and 1400 b of a transaction card 112 that passively amplifies an internal antenna 1402. Referring to FIG. 14A, the card 112 includes a passive amplification module 1406 that amplifies received RF signals using passive components. In the illustrated implementation, the passive amplification module 1406 a is a component separate from the transaction circuit 1404 a. The passive amplification module 1406 a may include one or more diodes, one or more resistors, one or more capacitors, and/or other components to passively amplify received RF signals (e.g., a single diode). The transaction circuit 1404 includes a virtual ground 1408. The internal antenna 1402 is connected to the transaction circuit 1404 through two dedicated antenna leads and passes received RF signals to the transaction circuit 1404. The passive amplification module 1406 connects to both a lead of the internal antenna 1402 and the virtual ground 1408 of the transaction circuit 1404. More specifically and for example, the antenna lead to which the passive amplification module 1304 connects to is, the lead that carries the modulation signals for data transfer. As previously mentioned, the passive amplification module 1406 amplifies received RF signals. For example, the passive amplification module 1406 may amplify the signal by a factor of about 10. Referring to FIG. 14B, the cross section 1400 b illustrates that the passive amplification module 1406 b is included in the transaction circuit 1408 b. In these implementations, the passive amplification module 1406 b connects to the virtual ground 1408 b and the lead of the antenna 1402 b in the transaction circuit 1408 b.

In addition, either implementation may operate in a power-off mode. In other words, the received RF signals may power the transaction card 112 independent of external power source (e.g., mobile-phone battery). In some implementations, the passive amplifier 1406 may draw enough power from the RF signals transmitted by readers to power the smartchip or transaction circuit 1404. For example, the transaction card 112 may use power from the RF signals in response to the host device losing power. In some implementations, the transaction circuit 1404 can receive a sufficient voltage output from the passive amplifier 1406 to boot up and start operating. In these instances, the transaction card 112 may execute transactions with the reader including responding appropriately for a successful transaction. For example, a user may lose power on a host device in connection with executing a transit application, the transaction card 112 may be able to pay for his metro ticket in the power-off mode. The transaction card 112 may power the transaction circuit using received RF signals.

FIGS. 15A and 15B illustrate cross sections 1500 a and 1500 b of transaction cards 112 that actively amplify RF signals. For example, the transaction card 112 amplifies signals using an external power supply (e.g., mobile-phone battery). Each transaction card 112 includes an active amplification module 1502. The output of the passive amplification module is connected to either the lead of the antenna 1504 or to a dedicated PIN 1503 in the transaction circuit. For example, the output of the amplification module 1502 connects to the non modulating lead of the antenna 1504. The input to the amplification module 1502 is regulated voltage supplied from the microcontroller unit 1501 of the transaction card which in turn receives power from the host device through the voltage output PIN 1506 of the SD interface. The pin 1506 may be a standard microSD pin (see FIG. 15A) and/or a dedicated pin (see FIG. 15B). In connection with inserting the card 112 in a host device, the pin 1506 connects the active amplification module 1502 to an external power source 1508 through the MCU 1501 of the transaction card. For example, the external power sources 1508 may be a battery of the host device. The active amplification module 1502 uses power from the external power source 1508 to amplify signals received and/or transmitted by the antenna 1504. In some implementations, the active amplification module 1502 can amplify signals a factor of about 10.

FIGS. 16A-C illustrate views 1600 a-c of transaction circuits 1602 a-c of a transaction card in accordance with some implementations of the present disclosure. In particular, the transaction circuit 1602 includes a printed circuit board (PCB) antenna 1604. In these implementations, the PCB antenna 1604 is embedded (or printed) with metal traces (e.g., copper) in a circuit board. For example, the antenna 1604 b may be embedded in the main MicroSD circuit board 1602, where the rest of the In2Pay hardware components are mounted. For example, the antenna 1604 b may also be partly embedded in the main MicroSD circuit board 1602 and may partly be in a separate antenna only PCB board. Two implementations include: (1) embed the entire antenna metal traces into the circuit board (see FIG. 16B); and (2) attach a separate antenna-only PCB onto the main MicroSD circuit board 1602 (see FIG. 16C). The antenna traces may be multi-layered such as regular multi-layer signal traces in a normal circuit board. In these implementations, the layers are connected through metal vias such as with regular multi-layer signal traces.

In some implementations, the PCB antenna 1604 can be manufactured using standard MicroSD manufacturing (assembly) flow and techniques such as metal trace lithography and planar processing, component pick-and-place, and/or component attachment. As a result, the PCB antenna 1604 may be better suited for automated mass manufacturing. In addition, metal traces can be fairly compact, i.e., space saving, as compared with coiled antennas. For example, more turns and longer wires may be used in metal traces in the PCB antenna 1604 as compared with coiled antennas.

In some implementations after the metal traces are manufactured around the periphery of the PCB antenna, it might leave available a cylindrical empty space that could be hollow. This hollow cylindrical space may be used to situate a ferrite core that may be used to magnetically attract the RF field available from the terminal and increase the performance of the antenna system.

FIG. 17 illustrates a cross section 1700 of a transaction card 112 that actively amplifies RF signals. For example, the transaction card 112 amplifies signals using an external power supply such as a battery in a mobile device. In the illustrated implementation, the transaction card 112 includes a transceiver 1702, a modulator 1704, and an amplifier that actively communicate RF signals. The transceiver 1702 wirelessly transmits and receives RF signals to and from transaction terminals. In some implementations, the transceiver 1702 may include an on-chip antenna (OCA), a coil on the chip antenna, or other elements that beam signals in a configurable frequency range. The modulator 1704 is connected to the transceiver 1702 and modulates the signal in accordance with one or more standards. For example, the modulator 1704 may be a software modulator that modulates the frequency range to the 13.54 MHz range. For example, the software code that drives the software modulator to operate in the appropriate frequency may reside in the MicroController Unit 1701 of the transaction card. In connection with inserting the card 112 in a host device, the power amplifier 1706 connects to the a regulated output voltage supplied by the MCU 1701 which in turn receives power from an external power source and the transceiver 1702. For example, the external power sources may be a battery of a mobile host device. The power amplifier 1706 uses power from the external power source to amplify signals received and/or transmitted. In some implementations, the power amplifier 1706 can amplify signals a factor of about 10.The power amplifier 1706 may ensures that the amplitude and voltage delivered to the smartchip is properly set to ensure operation.

In some implementations, the transaction card 112 can be shielded by metal included in surrounding circuitry in the mobile device. For example, the transaction card 112 may be inserted in a memory card slot that is behind a battery cover and unable to communicate via RF signal with a terminal or reader. In these instances, a low cost booster coupler may enhance the operating range of the transaction card 112. FIGS. 18 to 23 illustrate different possible implementations of the transaction card 112 with such a booster coupler. FIGS. 18A-D illustrate an example transaction card 112 including an antenna 1802 magnetically coupled to a booster coupler 1804. For example, the booster coupler 1804 may passively boost or otherwise increase RF signals communication range with the antenna 1802. In some implementations, the booster coupler 1804 can be physically separate from the card 112 that houses the antenna 1802. In other words, the card 112 may enclose at least a portion of the antenna 1802 and the booster coupler 1804 may be affixed to an inside or outside housing of the card 112 and wirelessly coupled to the antenna 1802. In the illustrated implementation, the reader antenna couples with the booster antenna 1804 which in turn couples with the antenna 1802, which may allow through induction a flow of energy and modulation to exchange information between the card 112 and the reader. In some instances, the booster coupler 1804 may operate as a repeater of the reader antenna and may boost the receptivity of the miniature antenna 1802 inside the card 112. The booster coupler 1804 may increase the magnetic flux density while repeating the reader magnetic field to allow effective induction between the antenna 1802 and the reader antenna at a greater operating range. In some implementations, the booster coupler 1804 can increase the RF signals communication range with the transaction card 112 using magnetic induction. Referring to FIG. 18C, the booster coupler 1804 may include at least three layers 1810, 1812, and 1814. The three layers 1810, 1812, and 1812 are for illustration purposes only and the booster coupler 1804 may include a single layer including the antenna inlay without departing from the scope of the disclosure. The layers 1812 and 1814 may be optional layers. Layer 1810 may include a substantially planar antenna 1806 such as a coiled antenna. In some implementations, only the shape of the antenna 1806 can be a coil. The antenna 1806 may be a thin wire and embedded in a thin sheet of PVC, a silver printing on paper, and/or another type of thin antenna coil inlay. Layer 1812 may be adjacent layer 1810 and include material 1816 that passively amplifies the signal (e.g., ferrite). In amplifying the signal, ferrite may shield the antenna 1806 from interference from signals generated elements on which the antenna 1806 is affixed by reflecting the flux outwards and reducing eddy currents. In the illustrated implementation, the material 1816 may include substantially planar ferrite. Layer 1814 may include an adhesive for attaching the booster coupler 1804 to a host device.

As illustrated in FIG. 18D, the booster coupler 1804 overlaps a portion of the antenna 1802 to passively amplify the RF signals reception range and/or transmission range from the antenna 1802 of the transaction card 112. The axis 1818 illustrates an example magnetic axis of the antenna 1806. In some implementations, a magnetic axis of the booster coupler 1804 and a magnetic axis of the antenna 1802 may substantially overlap as illustrated in FIG. 18D. By selectively positioning the magnetic axis to overlap, the booster coupler 1804 and the antenna 1802 may resonate at substantially the same frequency, which may maximize, enhance or otherwise increase induction with the reader antenna. For example, the booster coupler 1804 may include a coiled antenna that has a magnetic field substantially aligned along axis perpendicular to a plane of the coiled antenna. In this example, the transaction card 112 may include a coiled antenna having a magnetic field substantially aligned along an axis perpendicular to a plane of the coiled antenna. Continuing with this example, in the event that the two axis substantially overlap, the antenna 1802 and the booster coupler 1804 may be coupled through magnetic induction and wirelessly communicate. The booster coupler 1804 may include substantially the same shape and dimensions as a standard MicroSD card such that the booster coupler 1804 may substantially overlap the transaction card 112 during insertion in a host device. Though, the booster coupler 1804 may include a shape and/or dimensions different from the transaction card 112 without departing from the scope of the disclosure. In some implementations, the width and total surface area of the booster coupler 1804 may be greater than the width and total surface area of the antenna 1802. For example, the booster antenna 1804 must entirely overlap the antenna 1802 without overlapping the entire card 112.

The booster coupler 1804 may be affixed to a surface of the host device housing the card transaction card 112. For example, the booster coupler 1804 may be affixed to the housing surface using an adhesive. In some implementations, the booster coupler 1804 can form a thin and flat sticker on an inner or outer surface of the host device (e.g., device 110). In examples where the card slot is under a battery cover of the user device, the booster coupler 1804 may be affixed the inside of the battery cover such that, when the battery cover is closed, the booster coupler 1804 overlaps the antenna 1802. In the battery-cover example, the booster coupler 1804 may not be visible outside the device housing. In addition, the booster coupler 1804 may not include ferrite because the coupler 1804 may not be affixed to metal. Also, the booster coupler 1804 may be sufficiently thin to not pose a problem for the battery cover to close normally. In the same orientation, the booster coupler 1804 may be affixed to the outside of the battery cover in such a way that overlaps the antenna 1802 inside the device. In these instances, the booster coupler 1804 may include a brand for the associated financial institution and/or other enterprises. The booster coupler 1804 may include a plastic inlay enclosing at least a portion of the antenna 1808. The antenna 1808 may include a copper coil etched on a very thin plastic film forming one or more layers of the inlay. The antenna 1808 may connect to a passive amplification module such as the module 1406 as discussed above. In this case, signals communicated with the booster coupler 1804 may be passively amplified and/or tuned to the correct resonant frequency using one or more diodes, one or more resistors, one or more capacitors, and/or other components to passively amplify received RF signals (e.g., a single diode). In some implementations, the booster coupler 1804 may include a ferrite material to substantially insulate against interference of wireless signals by material of the surface of the device.

In some implementations, the transaction card 112 may experience interference associated with metal in the host device, circuit board, the socket (e.g., microSD socket), and/or other elements. The read range of the transaction card 112 may be reduced as a result of the interference. To maximize, enhance or otherwise increase the read range, the booster coupler 1804 may be affixed to the housing of the host device to substantially overlap the antenna of the transaction card 112. In doing so, the booster coupler 1804 may increase the RF sensitivity such that signals previously unreadable by the transaction card 112 may become readable. As discussed above, the booster coupler 1804 may be an external antenna and/or inlay that magnetically couples with the antenna 1802 embedded or otherwise included in the transaction card 112. In implementations as an external component, the booster coupler 1804 may be manufactured independent of the form factor and manufacturing constraints of the transaction card 112. The booster coupler 1804 may be manufactured with different types of adhesives such that the booster coupler 1804 may be affixed to different surfaces such as an external surface, an internal surface, plastic, metal, and/or others. In some implementations, the booster coupler 1804 may resonate at 13.56 MHz. The booster coupler 1804 may have a resonate frequency other than the ISO CONTACTLESS frequency of 13.56 MHz. In some implementations, the antenna 1802 and the booster coupler 1804 individually resonate at different resonant frequency but resonate at 13.56 MHz readers when coupled together. The frequency 13.56 MHz is merely for illustrative purposes and the reader may communicate using other frequencies. For example, the antenna 1802 and the booster coupler 1804 may communicate with a reader using a Ultra High Frequency (UHF) such as the resonant frequency 800 MHz and above.

FIGS. 19-22 illustrate passively amplifying communications with a transaction card 112 using the booster coupler 1804 in different orientations. In particular, FIGS. 19-21 illustrate the booster coupler 1804 affixed or otherwise associated with the housing of a host device 110, and FIG. 22 illustrates the booster coupler 1804 affixed or otherwise associated with a reader. As previously mentioned, different host devices 110 may include different configurations and/or orientations for receiving transaction cards 112. For example, a card socket may be enclosed in the housing of the host device 110 such that at least a portion of the housing is removed when inserting and/or removing the transaction card 112. In another example, the host device 110 may include an opening that receives the transaction card 110 without removing a portion of the housing such as a card slot on the side of the host device 110, such as an externally-accessible side socket.

Referring to FIGS. 19A-C, the system 1904 passively amplifies RF signals communicated with the host device 110. In the illustrated implementation, the host device 110 includes a socket 1908 enclosed in the housing 1910. In particular, a portion of the housing 1912 is removed or otherwise moved relative to the housing 1910 to insert or remove the transaction card 112 from the socket 1908. In the illustrated implementation, the booster coupler 1804 is affixed to the external or outer surface of the portion 1912. For example, the booster coupler 1804 may be attached to an outside cover, which covers the socket 1908 and inserted transaction card 112. The booster coupler 1804 may be oriented to overlap at least a portion of the transaction card 112. The booster coupler 1804 can, in some implementations, include relative dimensions much larger than illustrated such as at least twice the size of the card 112. A magnetic axis of the booster coupler 1804 may substantially overlap a magnetic axis of the transaction card 112 to magnetically couple the two elements. In some implementations, the housing 1910 entirely encloses the socket 1908 and may prevent users from externally accessing the transaction card 112. In this implementation, the booster coupler 1804 can be attached on the outside of the host device 110 without having to open, remove, or otherwise move the back cover 1912.

FIGS. 20A-D illustrate another example system 2004 that passively amplifies RF signals communicated with the transaction card 112. The host device 110 includes a socket 1908 enclosed in the housing 1910. As with the previous implementation, a cover 1912 encloses the transaction card 112 and the socket 1908. In contrast, the booster coupler 1804 is affixed to an internal surface of the cover 1912, and the cover 1912 and device 110 enclose the booster couple 1804 when the cover 1912 is attached to the device 110. The illustrated booster coupler 1804 may also be oriented to overlap at least a portion of the transaction card 112. The magnetic axis of the booster coupler 1804 and the transaction card 112 may substantially overlap for coupling using magnetic induction. In some implementations, the housing 1910 entirely encloses the socket 1908 and may prevent users from externally accessing the transaction card 112. In this implementation, the booster coupler 1804 can be attached on the inside of the host device 110, which may protect the coupler 1804 from view and/or detachment. FIG. 20D illustrates the booster coupler 1804 affixed to the transaction card 112 and a portion of an internal surface of the housing 1910 and is illustrated by the surface 2020. In this implementation, the booster coupler 1804 resides over a portion of the transaction card 112. As a result, the booster coupler 1804 may be attached directly to, for example, the socket 1908 without depending on the shape of the device 110 and/or an attachable space such as the surface 2010.

FIGS. 21A-C illustrate yet another system 2104 for passively amplifying RF signals. In this implementation, the host device 110 includes an external slot 2108. In other words, a user of the device 110 may insert or remove the transaction card 112 independent of removing a portion of the housing of the device 110. In the illustrated implementation, the host device 110 includes an opening of the slot 2108 formed by a side surface 2112. For example, the slot 2108 may be accessible through the side of the host device 110 without removing housing elements. As previously mentioned, different transaction cards 112 may include different antenna configurations. In the event that the antenna is proximate the opening of the slot 2108, the booster couple 1804 may be positioned to overlap the top surface 2110 and the side surface 2112. By overlapping the two surfaces, the magnetic axis of the booster coupler 1804 and the transaction card 112 may substantially overlap for magnetic coupling. In some implementations, the booster couple 1804 may include flexible elements, which may allows the coupler 1804 to wrap along the device contour to increase the coupling effect with the antenna included in the card 112. For devices 110 with a socket 2108 (e.g., microSD socket) externally accessible, the booster coupler 1804 may be attached on an outside phone surface on top and/or near the socket opening.

FIGS. 22A and 22B illustrate system 2300 that passively amplifies wireless communications between a reader 2202 and the host device 110. In the illustrated implementation, the booster coupler 1804 is affixed to the reader 2202. When the host device 110 including the transaction card 112 is proximate the reader 2202, the booster coupler 1804 may amplify wireless communication with the reader 2202. In some implementations, the booster 1804 on the reader 2202 may form a more concentrated magnetic field pattern such that the field concentration is increased and more energy is transferred to the card 112 by induction. For example, the booster coupler 1804 may amplify signals transmitted by the reader 2202.

FIGS. 23A-C illustrate another example system 2304 that passively amplifies RF signals communicated with the transaction card 112. The host device 110 includes a socket 1908 enclosed in the housing 1910. The cover 1912 encloses the transaction card 112 and the socket 1908. The booster coupler 1804 is embedded, integrated or otherwise included in the cover 1912, and, when the cover 1912 is in place, the illustrated booster coupler 1804 may be oriented to overlap at least a portion of the transaction card 112. The magnetic axis of the booster coupler 1804 and the transaction card 112 may substantially overlap for coupling using magnetic induction. The booster coupler 1804 may be included in the cover 1912 when, for example, the battery and/or housing cover 1912 is made of metal and interferes with signals. In some implementations, the cover 1912 may replace an original cover, which may have substantially the same physical shape and dimensions as the original cover. The cover 1912 may be made of plastic and may form the booster itself in its entirety. The embedded coupler 1804 assist in preventing the user from accidentally misaligning the placement of the booster coupler 1804 in the previous cases.

A number of embodiments of the invention have been described. Nevertheless, it will be understood that various modifications may be made without departing from the spirit and scope of the invention. Accordingly, other embodiments are within the scope of the following claims. 

1. A transaction system, comprising: a transaction card, comprising: a dynamic antenna; a memory-card interface that connects to a mobile host device; a communication module that wirelessly receives Radio Frequency (RF) signals from and transmits RF signals to a transaction terminal; secure memory that stores user credentials and a payment application used to execute financial transactions with the transaction terminal, the user credentials and the transaction application associated with an institution; a user-interface module that presents and receives information through the GUI of the mobile host device; a processing module that executes the transaction using the user credentials in response to at least a transaction request received by the RF module and transmits at least one transaction response to the terminal based, at least in part, on the executed transaction application; and a boosting element including a passive antenna configured to magnetically couple with the dynamic antenna and increase an operating range of RF signal communication between the dynamic antenna and the transaction terminal.
 2. The transaction system of claim 1, the passive antenna included in a first layer, further comprising a second layer coupled to the first layer and including an adhesive configured to affix the passive antenna to a device hosting the transaction card and at least proximate a card slot of the host device.
 3. The system of claim 1, the passive antenna included in a first layer, further comprising a second layer including substantially planar ferrite and a first surface and a second surface, the first surface affixed to the first layer and the second surface affixed to the second layer.
 4. The system of claim 1, the passive antenna substantially planar and at least twice as large as the dynamic antenna.
 5. The system of claim 4, the passive antenna comprising an antenna in a shape of a coil.
 6. The system of claim 1, the passive antenna configured to magnetically couple to the dynamic antenna inside the transaction card to substantially operate as a single antenna.
 7. The system of claim 6, the single antenna tuned to perform at an operating range greater than an operating range of the dynamic antenna inside the transaction card.
 8. The system of claim 1, the boosting element integrated in a housing of the host device for the transaction card.
 9. The system of claim 1, the mobile host device operates independent of interference from the boosting element.
 10. The system of claim 1, the boosting element affixed to an inner surface of a battery cover of the mobile host device.
 11. The system of claim 1, the boosting element affixed to the terminal, the terminal operates independent of interference from the boosting element.
 12. The system of claim 1, the transaction card configured to execute transactions with RF enabled terminals using RF signals transmitted in accordance with contactless standards ISO 14443 Type A and Type B, MiFare, RFID, Felica, NFC, ISO 15693, or Bluetooth.
 13. The system of claim 1, the user credentials associated with one of a credit card account, a checking account, a debit account, a gift account, or a prepaid account.
 14. The system of claim 1, wherein the processing module comprises: a security module that generates the transaction response based, at least in part, on the user credentials and the transaction application; and an operating system with a runtime environment that executes the transaction application independent of the mobile host device.
 15. A method for boosting an RF-signal communication range between a transaction card and a terminal, comprising: magnetically coupling an antenna of a transaction terminal and a passive antenna inside a boosting element; magnetically coupling the passive antenna inside the boosting element with a dynamic antenna of a transaction card, the transaction card inserted in a mobile host device, the boosting element coupled with the terminal antenna regenerating a terminal magnetic field with a higher flux density near the transaction card effecting an indirect magnetic coupling of the terminal antenna with the dynamic antenna; and wirelessly communicating RF signals between the terminal and the transaction card using indirect magnetic coupling.
 16. The method of claim 15, the indirect magnetic coupling through the boosting element allowing communication between the terminal and the transaction card at a greater operating range than direct coupling between the terminal antenna and the dynamic antenna inside the transaction card.
 17. The method of claim 15, further comprising substantially reducing interference generated by material of the mobile host device.
 18. The method of claim 15, the passive antenna adjacent a surface of the mobile host device or a surface of the terminal.
 19. The method of claim 15, the passive antenna magnetically coupled to the dynamic antenna to substantially operate as an antenna larger than the dynamic antenna.
 20. The method of claim 15, the passive antenna boosts a communication range of the terminal independent of interfering with operations of the mobile host device or the terminal. 